Glass manufacture



Patented dune 3, i924.

ELMER. DAVES, @F OKMT'LGEE, OKLAHM Application lcd February 16, 1923.

To all whom, t may concern:

Be it known that l, Emma DAVIS. a citizen of the United States, residing at Okmulgee, in the county of Okmulgee and State of Oklahoma. have invented certain new and useful improvements in Glass Manufacture, of which the following is a specification.

This invention pertains to the glass working art, and is directed to an apparatus by means of which molten glass may be transferred rom the melting tank or furnace toY a drawing pot or receptacle, without the inter-ference of several objectional 'features now common in the art.

ln the manipulation of molten glass and the development thereof into the finished product, it is essential that a uniform ternperature be maintained throughout lthe batch of molten glass from which the finished article is drawn.

One of the objects of this invention is to dispense with the manual labor incident to the step of ladling as it is known in the art, and to overcome the diiiiculties encountered in ladling the molten glass 'from the melting tank to the drawing receptacle. ln this of that portion of the glass which comes into immediate contact with the lower temperatured ladle, resulting in blisters and blemishes appearing therefrom in the finished product. @ther advantages of my invention will appear as the description thereof proceeds. l

ln the drawings, showing the preferred embodiment of my invention:

Fig 1, is a longitudinal vertical section, showing the front end of a melting tank with my improvement applied thereto.

Fig. 2, an end view, partly diagrammatic, and

Fig. 3, is a sectional view-0f one of the elements shown in Fig. 1, taken on the lines 3 3. i y

Like reference numerals refer to corresponding 'parts throughout the drawings.

in the drawings, 1, represents the main melting tank in which the glass is reduced to a fluid state; 2, is an extension built out from the main tank 1, and commonly called a dog house, and into which the molten glass is adapted to flow from the main tank 1; 3, is a chamber positioned below the extension 2, also adapted to contain molten glass; 4, is a movable glass conveyor positioned within 'the chamber 3, and forms an step it is impossible to avoid a chilling Serial No. @$1,455.

important' part of' this invention.; 6, is a valve member adapted to open and close the port 8, located in ther dividing wall 7, between the chambers 2 and 3. v

The front wall of the tank 1, has an' opening 9, which communicates with the chamber 2. Located parallel with this iront wall of the tank 1, 'and adapted tor vertical movement is the shear cake 5 operating between the shoulders 10, to close the opening 9, between the main tank 1, ,and the chamber 2.

rlhe movable glass conveyor a is adapted to be supported at its inner end by its own buoyancy in the glass 21, and at its outer end by the supporting upright 22, suspended from the trolley 12 operating on the tracks 23. The glass line level in the chamber 3, as ,at 21, is maintained by novel means that will `hereinafter be more fully explained.

When the molten glass within this chamber 2, has acquired the proper temperature, and it is desired to transfer a portion thereof to the drawing pot 13, the movable conveyor 4 is positioned as shown in the dotted lines in Fig. 1. ture 1,1, in the bottom wall of the conveyor d will he directly over the pot 13. With the conveyor so positioned, as the valve member 6 is raised to uncover the port 8, glass will flow therethrough intoA the conveyor 4f. As the glass covers the bottom of the conveyor 4, it will seek an outlet at 11, and -ilow into the pot 13. When the requisite amount of molten glass is deposited in the pot 13, for drawing any given glass article there-from,

ln this position the apery the conveyor iy is again returned to its original position shown in Fig. 1, with the flange member 20. closing the aperture in the chamber 3, within which the conveyor 4 is adapted to operate. As the flange member. 20, closes the aperture, the A temperature within the chamber 3 will rise to 'the re- 'quired point of increasing the temperature of the conveyor 4, and to cause any conmolten glass are provided, comprising heating means well known in the art.

The pot 13, shown in cross section in Fig. l, is of the usual form of reversible drawing pot provided with annular flanges for holding the glass therein. The drawing of the glass from the pot is a process well vknown in the art and forms no part of this invention, and no further description thereof is necessary. Any of the well known glass drawing machines can be used in conjunction with this invention.

llt will be readily perceived that in the operation of my novel arrangement l avoid the serious diihculties encountered in the methods new in common use. ln such prior methods it is impossible to avoid disturbing the molecules of the molten glass or stirring the glass after it is melted, and this agitation of the molten mass is detrimental to the finished product.

ln the process of ladling it is enevitahle that the wall of the melting tank must he provided with an opening` for the insertion of the ladle, through which colder air enters the tank and necessarily comes in contact with the surface of the glass being disturhed ley the immersion of the ladle therein, and it is this agitation of the mass during the slight coolingl which takes place through the Contact or the cooler air therewith, that causes lines and 'blisters in the finished product.

will he obvious to those skilled in the art, that my improved apparatus for transerring the molten glass from the melting tank to the drawing pot, by means of the movahle carrier provide for taking the glass from a melting tank that is maintained practically sealed from the atmosphere, and that the glass is drawn from a Zone oi at a substantial distance from the surface the glass, thereby eliminat ing the commingling" with the glass being worked, oli foreign suhstancee impurities alw i found doating ontthe surliface ot glass within a will also los perceived that I provide novel means Ltor maintaining thv e i carrier the required temperature l l taining" it partially immersed in highly temperatured mol'ei ically removes 1 herein7 ent -th 'rposc illustre t 1understood 'that to une spe-cme struc maaier l. In. apparatus for the manufacture of glass, a tank having an extended end portion divided into upper and lower glass holding compartments, a glass discharge port located between said compartments, a glass conveying trough having one end huoyantly' supported by the glass in the lower compartment andy positioned to receive molten glass discharged through said port substantially as described.

2. ln apparatus for manufacture of glass, a tank having an extended end portion divided into upper and lower compartments tor containing molten glass, a closable port interposed between said compartments for the discharge ot' glass therethrough, a glass conveying trough normally positioned within the lower compartment having one end extended and supported 'cy means outside of said compartment with its inner end supported hy its own buoyancy in the molten glass, and positioned to receive molten glass discharged from said port.

ln apparatus for the manufacture of glass, a tank having an extended end portion divided into upper and lower compartments containing molten glass; a glass drawing pot located adjacent to said lower compartment; a glass conveyor positioned within said lower compartment and partially supported hy the molten glass therein adapted to receive molten glass from said upper compartment and to discharge the same into said glass drawing pot.

fl. A glass working apparatus comprising a melting tank having an enclosed extended end portion formed with a bottom wall having a glass discharge port therein; a heating. kiln positioned under said extended end portion and a horizont-ally movable glass conveyor normally positioned within said lriln adapted vreceive molten from sri l yd'scharge port.

a 'oaratus for manufacture ciU ass, a 'tank iior containing molten glass r an enclosed extended end portion with a loottoin wall provided with u.' charge port therein; a heating .ad under said extended end porglass receiving ted to receive fr-ort and means for erature or said above 'noi titl lill

Memor said kiln; a glass conveying trough positioned normally within the' lower compartment and adapted to receive glass :from said discharge port and convey it to said drawing pot substantially as described.

7. A glass working apparatus comprising a melting tank having an extended end portion formed with a bottom wall having a closable glass discharge port therein, a heatio ing kiln positioned under said extended end portion; a glass drawing pot adjacent to said kiln, a glass conveying trough normally positioned within said kiln provided with a. discharge port at one end thereof, and means to move said trough to place its discharge M port over the drawing pot, to discharge t glass therein. p

In testimony whereof I have aixed my si gnature.

ELMER DAVIS. 

